What is the same
- both have 14g tanks (actually 14.4 but i’m going to use round numbers).
- both have 10 usable gallons.
What is different
- the hybrid will show 3/4 tank at the pump after filling. the prime will show full.
- the hybrid only holds 12g. the prime holds 14g.
- the hybrid has 2g reserve. the prime effectively has 4g reserve despite what the manual says.
- the hybrid gauge is accurate. the prime gauge is not. it reads empty when the car still has 75+ usable miles of gas in it before hitting reserve.
- the hybrid range estimate is accurate. the prime is not. it will estimate initially based on the nominal 12g, but then revise estimate dramatically when the tank gets low.



